Hook rack



FIG. 1 is a perspective view of the hook rack;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a side elevational view thereof.

The broken lines depict portions of the design that form no part of the claim. 

The ornamental design for a hook rack, as shown and described. 